My professor noted that bromination with light and methylene chloride gives you exclusively the monobromination product.
However, bromination without light will give you the multi-brominated product.
I have no found any reference to bromination in my textbook nor online. Is the second statement an accurate statement?
Answer
Bromination of alkanes with Br2 will not occur in a dark environment. In the presence of light, multiple halogenations can occur given enough time.
For more information, including the full mechanism, check out: https://en.wikipedia.org/wiki/Free-radical_halogenation
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